aboutsummaryrefslogtreecommitdiffstats
path: root/arch/m68k/mac/misc.c
blob: 5d818568b343719a7ab82f9a8fb075a048a9535e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
/*
 * Miscellaneous Mac68K-specific stuff
 */

#include <linux/types.h>
#include <linux/errno.h>
#include <linux/miscdevice.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/time.h>
#include <linux/rtc.h>
#include <linux/mm.h>

#include <linux/adb.h>
#include <linux/cuda.h>
#include <linux/pmu.h>

#include <asm/uaccess.h>
#include <asm/io.h>
#include <asm/rtc.h>
#include <asm/system.h>
#include <asm/segment.h>
#include <asm/setup.h>
#include <asm/macintosh.h>
#include <asm/mac_via.h>
#include <asm/mac_oss.h>

#define BOOTINFO_COMPAT_1_0
#include <asm/bootinfo.h>
#include <asm/machdep.h>

/* Offset between Unix time (1970-based) and Mac time (1904-based) */

#define RTC_OFFSET 2082844800

static void (*rom_reset)(void);

#ifdef CONFIG_ADB_CUDA
static long cuda_read_time(void)
{
	struct adb_request req;
	long time;

	if (cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_GET_TIME) < 0)
		return 0;
	while (!req.complete)
		cuda_poll();

	time = (req.reply[3] << 24) | (req.reply[4] << 16)
		| (req.reply[5] << 8) | req.reply[6];
	return time - RTC_OFFSET;
}

static void cuda_write_time(long data)
{
	struct adb_request req;
	data += RTC_OFFSET;
	if (cuda_request(&req, NULL, 6, CUDA_PACKET, CUDA_SET_TIME,
			(data >> 24) & 0xFF, (data >> 16) & 0xFF,
			(data >> 8) & 0xFF, data & 0xFF) < 0)
		return;
	while (!req.complete)
		cuda_poll();
}

static __u8 cuda_read_pram(int offset)
{
	struct adb_request req;
	if (cuda_request(&req, NULL, 4, CUDA_PACKET, CUDA_GET_PRAM,
			(offset >> 8) & 0xFF, offset & 0xFF) < 0)
		return 0;
	while (!req.complete)
		cuda_poll();
	return req.reply[3];
}

static void cuda_write_pram(int offset, __u8 data)
{
	struct adb_request req;
	if (cuda_request(&req, NULL, 5, CUDA_PACKET, CUDA_SET_PRAM,
			(offset >> 8) & 0xFF, offset & 0xFF, data) < 0)
		return;
	while (!req.complete)
		cuda_poll();
}
#else
#define cuda_read_time() 0
#define cuda_write_time(n)
#define cuda_read_pram NULL
#define cuda_write_pram NULL
#endif

#if 0 /* def CONFIG_ADB_PMU68K */
static long pmu_read_time(void)
{
	struct adb_request req;
	long time;

	if (pmu_request(&req, NULL, 1, PMU_READ_RTC) < 0)
		return 0;
	while (!req.complete)
		pmu_poll();

	time = (req.reply[0] << 24) | (req.reply[1] << 16)
		| (req.reply[2] << 8) | req.reply[3];
	return time - RTC_OFFSET;
}

static void pmu_write_time(long data)
{
	struct adb_request req;
	data += RTC_OFFSET;
	if (pmu_request(&req, NULL, 5, PMU_SET_RTC,
			(data >> 24) & 0xFF, (data >> 16) & 0xFF,
			(data >> 8) & 0xFF, data & 0xFF) < 0)
		return;
	while (!req.complete)
		pmu_poll();
}

static __u8 pmu_read_pram(int offset)
{
	struct adb_request req;
	if (pmu_request(&req, NULL, 3, PMU_READ_NVRAM,
			(offset >> 8) & 0xFF, offset & 0xFF) < 0)
		return 0;
	while (!req.complete)
		pmu_poll();
	return req.reply[3];
}

static void pmu_write_pram(int offset, __u8 data)
{
	struct adb_request req;
	if (pmu_request(&req, NULL, 4, PMU_WRITE_NVRAM,
			(offset >> 8) & 0xFF, offset & 0xFF, data) < 0)
		return;
	while (!req.complete)
		pmu_poll();
}
#else
#define pmu_read_time() 0
#define pmu_write_time(n)
#define pmu_read_pram NULL
#define pmu_write_pram NULL
#endif

#if 0 /* def CONFIG_ADB_MACIISI */
extern int maciisi_request(struct adb_request *req,
			void (*done)(struct adb_request *), int nbytes, ...);

static long maciisi_read_time(void)
{
	struct adb_request req;
	long time;

	if (maciisi_request(&req, NULL, 2, CUDA_PACKET, CUDA_GET_TIME))
		return 0;

	time = (req.reply[3] << 24) | (req.reply[4] << 16)
		| (req.reply[5] << 8) | req.reply[6];
	return time - RTC_OFFSET;
}

static void maciisi_write_time(long data)
{
	struct adb_request req;
	data += RTC_OFFSET;
	maciisi_request(&req, NULL, 6, CUDA_PACKET, CUDA_SET_TIME,
			(data >> 24) & 0xFF, (data >> 16) & 0xFF,
			(data >> 8) & 0xFF, data & 0xFF);
}

static __u8 maciisi_read_pram(int offset)
{
	struct adb_request req;
	if (maciisi_request(&req, NULL, 4, CUDA_PACKET, CUDA_GET_PRAM,
			(offset >> 8) & 0xFF, offset & 0xFF))
		return 0;
	return req.reply[3];
}

static void maciisi_write_pram(int offset, __u8 data)
{
	struct adb_request req;
	maciisi_request(&req, NULL, 5, CUDA_PACKET, CUDA_SET_PRAM,
			(offset >> 8) & 0xFF, offset & 0xFF, data);
}
#else
#define maciisi_read_time() 0
#define maciisi_write_time(n)
#define maciisi_read_pram NULL
#define maciisi_write_pram NULL
#endif

/*
 * VIA PRAM/RTC access routines
 *
 * Must be called with interrupts disabled and
 * the RTC should be enabled.
 */

static __u8 via_pram_readbyte(void)
{
	int	i,reg;
	__u8	data;

	reg = via1[vBufB] & ~VIA1B_vRTCClk;

	/* Set the RTC data line to be an input. */

	via1[vDirB] &= ~VIA1B_vRTCData;

	/* The bits of the byte come out in MSB order */

	data = 0;
	for (i = 0 ; i < 8 ; i++) {
		via1[vBufB] = reg;
		via1[vBufB] = reg | VIA1B_vRTCClk;
		data = (data << 1) | (via1[vBufB] & VIA1B_vRTCData);
	}

	/* Return RTC data line to output state */

	via1[vDirB] |= VIA1B_vRTCData;

	return data;
}

static void via_pram_writebyte(__u8 data)
{
	int	i,reg,bit;

	reg = via1[vBufB] & ~(VIA1B_vRTCClk | VIA1B_vRTCData);

	/* The bits of the byte go in in MSB order */

	for (i = 0 ; i < 8 ; i++) {
		bit = data & 0x80? 1 : 0;
		data <<= 1;
		via1[vBufB] = reg | bit;
		via1[vBufB] = reg | bit | VIA1B_vRTCClk;
	}
}

/*
 * Execute a VIA PRAM/RTC command. For read commands
 * data should point to a one-byte buffer for the
 * resulting data. For write commands it should point
 * to the data byte to for the command.
 *
 * This function disables all interrupts while running.
 */

static void via_pram_command(int command, __u8 *data)
{
	unsigned long flags;
	int	is_read;

	local_irq_save(flags);

	/* Enable the RTC and make sure the strobe line is high */

	via1[vBufB] = (via1[vBufB] | VIA1B_vRTCClk) & ~VIA1B_vRTCEnb;

	if (command & 0xFF00) {		/* extended (two-byte) command */
		via_pram_writebyte((command & 0xFF00) >> 8);
		via_pram_writebyte(command & 0xFF);
		is_read = command & 0x8000;
	} else {			/* one-byte command */
		via_pram_writebyte(command);
		is_read = command & 0x80;
	}
	if (is_read) {
		*data = via_pram_readbyte();
	} else {
		via_pram_writebyte(*data);
	}

	/* All done, disable the RTC */

	via1[vBufB] |= VIA1B_vRTCEnb;

	local_irq_restore(flags);
}

static __u8 via_read_pram(int offset)
{
	return 0;
}

static void via_write_pram(int offset, __u8 data)
{
}

/*
 * Return the current time in seconds since January 1, 1904.
 *
 * This only works on machines with the VIA-based PRAM/RTC, which
 * is basically any machine with Mac II-style ADB.
 */

static long via_read_time(void)
{
	union {
		__u8  cdata[4];
		long  idata;
	} result, last_result;
	int	ct;

	/*
	 * The NetBSD guys say to loop until you get the same reading
	 * twice in a row.
	 */

	ct = 0;
	do {
		if (++ct > 10) {
			printk("via_read_time: couldn't get valid time, "
			       "last read = 0x%08lx and 0x%08lx\n",
			       last_result.idata, result.idata);
			break;
		}

		last_result.idata = result.idata;
		result.idata = 0;

		via_pram_command(0x81, &result.cdata[3]);
		via_pram_command(0x85, &result.cdata[2]);
		via_pram_command(0x89, &result.cdata[1]);
		via_pram_command(0x8D, &result.cdata[0]);
	} while (result.idata != last_result.idata);

	return result.idata - RTC_OFFSET;
}

/*
 * Set the current time to a number of seconds since January 1, 1904.
 *
 * This only works on machines with the VIA-based PRAM/RTC, which
 * is basically any machine with Mac II-style ADB.
 */

static void via_write_time(long time)
{
	union {
		__u8  cdata[4];
		long  idata;
	} data;
	__u8	temp;

	/* Clear the write protect bit */

	temp = 0x55;
	via_pram_command(0x35, &temp);

	data.idata = time + RTC_OFFSET;
	via_pram_command(0x01, &data.cdata[3]);
	via_pram_command(0x05, &data.cdata[2]);
	via_pram_command(0x09, &data.cdata[1]);
	via_pram_command(0x0D, &data.cdata[0]);

	/* Set the write protect bit */

	temp = 0xD5;
	via_pram_command(0x35, &temp);
}

static void via_shutdown(void)
{
	if (rbv_present) {
		via2[rBufB] &= ~0x04;
	} else {
		/* Direction of vDirB is output */
		via2[vDirB] |= 0x04;
		/* Send a value of 0 on that line */
		via2[vBufB] &= ~0x04;
		mdelay(1000);
	}
}

/*
 * FIXME: not sure how this is supposed to work exactly...
 */

static void oss_shutdown(void)
{
	oss->rom_ctrl = OSS_POWEROFF;
}

#ifdef CONFIG_ADB_CUDA

static void cuda_restart(void)
{
	struct adb_request req;
	if (cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_RESET_SYSTEM) < 0)
		return;
	while (!req.complete)
		cuda_poll();
}

static void cuda_shutdown(void)
{
	struct adb_request req;
	if (cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_POWERDOWN) < 0)
		return;
	while (!req.complete)
		cuda_poll();
}

#endif /* CONFIG_ADB_CUDA */

#ifdef CONFIG_ADB_PMU68K

void pmu_restart(void)
{
	struct adb_request req;
	if (pmu_request(&req, NULL,
			2, PMU_SET_INTR_MASK, PMU_INT_ADB|PMU_INT_TICK) < 0)
		return;
	while (!req.complete)
		pmu_poll();
	if (pmu_request(&req, NULL, 1, PMU_RESET) < 0)
		return;
	while (!req.complete)
		pmu_poll();
}

void pmu_shutdown(void)
{
	struct adb_request req;
	if (pmu_request(&req, NULL,
			2, PMU_SET_INTR_MASK, PMU_INT_ADB|PMU_INT_TICK) < 0)
		return;
	while (!req.complete)
		pmu_poll();
	if (pmu_request(&req, NULL, 5, PMU_SHUTDOWN, 'M', 'A', 'T', 'T') < 0)
		return;
	while (!req.complete)
		pmu_poll();
}

#endif

/*
 *-------------------------------------------------------------------
 * Below this point are the generic routines; they'll dispatch to the
 * correct routine for the hardware on which we're running.
 *-------------------------------------------------------------------
 */

void mac_pram_read(int offset, __u8 *buffer, int len)
{
	__u8 (*func)(int);
	int i;

	switch(macintosh_config->adb_type) {
	case MAC_ADB_IISI:
		func = maciisi_read_pram; break;
	case MAC_ADB_PB1:
	case MAC_ADB_PB2:
		func = pmu_read_pram; break;
	case MAC_ADB_CUDA:
		func = cuda_read_pram; break;
	default:
		func = via_read_pram;
	}
	if (!func)
		return;
	for (i = 0 ; i < len ; i++) {
		buffer[i] = (*func)(offset++);
	}
}

void mac_pram_write(int offset, __u8 *buffer, int len)
{
	void (*func)(int, __u8);
	int i;

	switch(macintosh_config->adb_type) {
	case MAC_ADB_IISI:
		func = maciisi_write_pram; break;
	case MAC_ADB_PB1:
	case MAC_ADB_PB2:
		func = pmu_write_pram; break;
	case MAC_ADB_CUDA:
		func = cuda_write_pram; break;
	default:
		func = via_write_pram;
	}
	if (!func)
		return;
	for (i = 0 ; i < len ; i++) {
		(*func)(offset++, buffer[i]);
	}
}

void mac_poweroff(void)
{
	/*
	 * MAC_ADB_IISI may need to be moved up here if it doesn't actually
	 * work using the ADB packet method.  --David Kilzer
	 */

	if (oss_present) {
		oss_shutdown();
	} else if (macintosh_config->adb_type == MAC_ADB_II) {
		via_shutdown();
#ifdef CONFIG_ADB_CUDA
	} else if (macintosh_config->adb_type == MAC_ADB_CUDA) {
		cuda_shutdown();
#endif
#ifdef CONFIG_ADB_PMU68K
	} else if (macintosh_config->adb_type == MAC_ADB_PB1
		|| macintosh_config->adb_type == MAC_ADB_PB2) {
		pmu_shutdown();
#endif
	}
	local_irq_enable();
	printk("It is now safe to turn off your Macintosh.\n");
	while(1);
}

void mac_reset(void)
{
	if (macintosh_config->adb_type == MAC_ADB_II) {
		unsigned long flags;

		/* need ROMBASE in booter */
		/* indeed, plus need to MAP THE ROM !! */

		if (mac_bi_data.rombase == 0)
			mac_bi_data.rombase = 0x40800000;

		/* works on some */
		rom_reset = (void *) (mac_bi_data.rombase + 0xa);

		if (macintosh_config->ident == MAC_MODEL_SE30) {
			/*
			 * MSch: Machines known to crash on ROM reset ...
			 */
		} else {
			local_irq_save(flags);

			rom_reset();

			local_irq_restore(flags);
		}
#ifdef CONFIG_ADB_CUDA
	} else if (macintosh_config->adb_type == MAC_ADB_CUDA) {
		cuda_restart();
#endif
#ifdef CONFIG_ADB_PMU68K
	} else if (macintosh_config->adb_type == MAC_ADB_PB1
		|| macintosh_config->adb_type == MAC_ADB_PB2) {
		pmu_restart();
#endif
	} else if (CPU_IS_030) {

		/* 030-specific reset routine.  The idea is general, but the
		 * specific registers to reset are '030-specific.  Until I
		 * have a non-030 machine, I can't test anything else.
		 *  -- C. Scott Ananian <cananian@alumni.princeton.edu>
		 */

		unsigned long rombase = 0x40000000;

		/* make a 1-to-1 mapping, using the transparent tran. reg. */
		unsigned long virt = (unsigned long) mac_reset;
		unsigned long phys = virt_to_phys(mac_reset);
		unsigned long addr = (phys&0xFF000000)|0x8777;
		unsigned long offset = phys-virt;
		local_irq_disable(); /* lets not screw this up, ok? */
		__asm__ __volatile__(".chip 68030\n\t"
				     "pmove %0,%/tt0\n\t"
				     ".chip 68k"
				     : : "m" (addr));
		/* Now jump to physical address so we can disable MMU */
		__asm__ __volatile__(
                    ".chip 68030\n\t"
		    "lea %/pc@(1f),%/a0\n\t"
		    "addl %0,%/a0\n\t"/* fixup target address and stack ptr */
		    "addl %0,%/sp\n\t"
		    "pflusha\n\t"
		    "jmp %/a0@\n\t" /* jump into physical memory */
		    "0:.long 0\n\t" /* a constant zero. */
		    /* OK.  Now reset everything and jump to reset vector. */
		    "1:\n\t"
		    "lea %/pc@(0b),%/a0\n\t"
		    "pmove %/a0@, %/tc\n\t" /* disable mmu */
		    "pmove %/a0@, %/tt0\n\t" /* disable tt0 */
		    "pmove %/a0@, %/tt1\n\t" /* disable tt1 */
		    "movel #0, %/a0\n\t"
		    "movec %/a0, %/vbr\n\t" /* clear vector base register */
		    "movec %/a0, %/cacr\n\t" /* disable caches */
		    "movel #0x0808,%/a0\n\t"
		    "movec %/a0, %/cacr\n\t" /* flush i&d caches */
		    "movew #0x2700,%/sr\n\t" /* set up status register */
		    "movel %1@(0x0),%/a0\n\t"/* load interrupt stack pointer */
		    "movec %/a0, %/isp\n\t"
		    "movel %1@(0x4),%/a0\n\t" /* load reset vector */
		    "reset\n\t" /* reset external devices */
		    "jmp %/a0@\n\t" /* jump to the reset vector */
		    ".chip 68k"
		    : : "r" (offset), "a" (rombase) : "a0");
	}

	/* should never get here */
	local_irq_enable();
	printk ("Restart failed.  Please restart manually.\n");
	while(1);
}

/*
 * This function translates seconds since 1970 into a proper date.
 *
 * Algorithm cribbed from glibc2.1, __offtime().
 */
#define SECS_PER_MINUTE (60)
#define SECS_PER_HOUR  (SECS_PER_MINUTE * 60)
#define SECS_PER_DAY   (SECS_PER_HOUR * 24)

static void unmktime(unsigned long time, long offset,
		     int *yearp, int *monp, int *dayp,
		     int *hourp, int *minp, int *secp)
{
        /* How many days come before each month (0-12).  */
	static const unsigned short int __mon_yday[2][13] =
	{
		/* Normal years.  */
		{ 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 },
		/* Leap years.  */
		{ 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 }
	};
	long int days, rem, y, wday, yday;
	const unsigned short int *ip;

	days = time / SECS_PER_DAY;
	rem = time % SECS_PER_DAY;
	rem += offset;
	while (rem < 0) {
		rem += SECS_PER_DAY;
		--days;
	}
	while (rem >= SECS_PER_DAY) {
		rem -= SECS_PER_DAY;
		++days;
	}
	*hourp = rem / SECS_PER_HOUR;
	rem %= SECS_PER_HOUR;
	*minp = rem / SECS_PER_MINUTE;
	*secp = rem % SECS_PER_MINUTE;
	/* January 1, 1970 was a Thursday. */
	wday = (4 + days) % 7; /* Day in the week. Not currently used */
	if (wday < 0) wday += 7;
	y = 1970;

#define DIV(a, b) ((a) / (b) - ((a) % (b) < 0))
#define LEAPS_THRU_END_OF(y) (DIV (y, 4) - DIV (y, 100) + DIV (y, 400))
#define __isleap(year)	\
  ((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0))

	while (days < 0 || days >= (__isleap (y) ? 366 : 365))
	{
		/* Guess a corrected year, assuming 365 days per year.  */
		long int yg = y + days / 365 - (days % 365 < 0);

		/* Adjust DAYS and Y to match the guessed year.  */
		days -= ((yg - y) * 365
			 + LEAPS_THRU_END_OF (yg - 1)
			 - LEAPS_THRU_END_OF (y - 1));
		y = yg;
	}
	*yearp = y - 1900;
	yday = days; /* day in the year.  Not currently used. */
	ip = __mon_yday[__isleap(y)];
	for (y = 11; days < (long int) ip[y]; --y)
		continue;
	days -= ip[y];
	*monp = y;
	*dayp = days + 1; /* day in the month */
	return;
}

/*
 * Read/write the hardware clock.
 */

int mac_hwclk(int op, struct rtc_time *t)
{
	unsigned long now;

	if (!op) { /* read */
		switch (macintosh_config->adb_type) {
		case MAC_ADB_II:
		case MAC_ADB_IOP:
			now = via_read_time();
			break;
		case MAC_ADB_IISI:
			now = maciisi_read_time();
			break;
		case MAC_ADB_PB1:
		case MAC_ADB_PB2:
			now = pmu_read_time();
			break;
		case MAC_ADB_CUDA:
			now = cuda_read_time();
			break;
		default:
			now = 0;
		}

		t->tm_wday = 0;
		unmktime(now, 0,
			 &t->tm_year, &t->tm_mon, &t->tm_mday,
			 &t->tm_hour, &t->tm_min, &t->tm_sec);
#if 0
		printk("mac_hwclk: read %04d-%02d-%-2d %02d:%02d:%02d\n",
			t->tm_year + 1900, t->tm_mon + 1, t->tm_mday,
			t->tm_hour, t->tm_min, t->tm_sec);
#endif
	} else { /* write */
#if 0
		printk("mac_hwclk: tried to write %04d-%02d-%-2d %02d:%02d:%02d\n",
			t->tm_year + 1900, t->tm_mon + 1, t->tm_mday,
			t->tm_hour, t->tm_min, t->tm_sec);
#endif

		now = mktime(t->tm_year + 1900, t->tm_mon + 1, t->tm_mday,
			     t->tm_hour, t->tm_min, t->tm_sec);

		switch (macintosh_config->adb_type) {
		case MAC_ADB_II:
		case MAC_ADB_IOP:
			via_write_time(now);
			break;
		case MAC_ADB_CUDA:
			cuda_write_time(now);
			break;
		case MAC_ADB_PB1:
		case MAC_ADB_PB2:
			pmu_write_time(now);
			break;
		case MAC_ADB_IISI:
			maciisi_write_time(now);
		}
	}
	return 0;
}

/*
 * Set minutes/seconds in the hardware clock
 */

int mac_set_clock_mmss (unsigned long nowtime)
{
	struct rtc_time now;

	mac_hwclk(0, &now);
	now.tm_sec = nowtime % 60;
	now.tm_min = (nowtime / 60) % 60;
	mac_hwclk(1, &now);

	return 0;
}